:root {
  --label: #1d1d1f; --label-2: rgba(60, 60, 67, .72); --label-3: rgba(60, 60, 67, .46); --separator: rgba(60, 60, 67, .14);
  --bg: #f5f5f7; --card: #fff; --raised: #fafafa; --header-bg: rgba(245, 245, 247, .78);
  --accent: #0b7d5a; --on-accent: #fff; --accent-soft: rgba(52, 211, 153, .16);
  --deep: #123a33; --cream: #ede7da; --ok: #12a37a; --warn: #d4930b;
  --shadow: 0 0 0 .5px var(--separator), 0 1px 2px rgba(0, 0, 0, .04), 0 12px 32px rgba(0, 0, 0, .06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --label: rgba(255, 255, 255, .92); --label-2: rgba(235, 235, 245, .64); --label-3: rgba(235, 235, 245, .4); --separator: rgba(255, 255, 255, .1);
    --bg: #0e1110; --card: #181c1b; --raised: #1f2422; --header-bg: rgba(14, 17, 16, .72);
    --accent: #34d399; --on-accent: #06281e; --accent-soft: rgba(52, 211, 153, .12);
    --ok: #34d399; --warn: #f5b83d;
    --shadow: 0 0 0 .5px var(--separator), 0 12px 32px rgba(0, 0, 0, .45);
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--label); -webkit-font-smoothing: antialiased;
  background: radial-gradient(1100px 520px at 50% -160px, var(--accent-soft), transparent 70%) no-repeat, var(--bg);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font: .85em ui-monospace, "SF Mono", Menlo, monospace; background: var(--card); padding: 2px 6px; border-radius: 6px; box-shadow: 0 0 0 .5px var(--separator); }

/* Layout */
.wrap { max-width: 1040px; margin: 0 auto; padding-inline: 24px; }
.narrow { max-width: 720px; }
section { padding-block: 72px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: var(--header-bg); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: .5px solid var(--separator); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 18px; color: var(--label); }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; }
.site-header nav { display: flex; align-items: center; gap: 22px; font-size: 15px; }
.site-header nav a { color: var(--label-2); }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--label); text-decoration: none; }
.lang { padding: 3px 11px; border-radius: 999px; box-shadow: 0 0 0 1px var(--separator); }
.site-header nav .lang { color: var(--label); }
.lang:hover { text-decoration: none; background: var(--card); }

/* Buttons */
.actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; gap: 8px; padding: 12px 26px; border-radius: 999px; background: var(--accent); color: var(--on-accent); font-weight: 600; }
.button:hover { text-decoration: none; filter: brightness(1.06); }
.button.secondary { background: var(--card); color: var(--label); box-shadow: 0 0 0 .5px var(--separator), 0 1px 2px rgba(0, 0, 0, .06); }
.button svg { width: 18px; height: 18px; fill: currentColor; }

/* Hero */
.hero { text-align: center; padding-block: 80px 40px; }
.hero > img { width: 112px; height: 112px; filter: drop-shadow(0 14px 28px rgba(18, 58, 51, .3)); }
h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.1; letter-spacing: -.025em; margin: 28px auto 16px; max-width: 820px; text-wrap: balance; }
:lang(zh) h1, :lang(zh) h2 { letter-spacing: 0; }
.lead { font-size: clamp(18px, 2.4vw, 21px); color: var(--label-2); margin: 0 auto 32px; max-width: 600px; }
.note { color: var(--label-3); font-size: 14px; margin: 16px 0 0; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: 15px; margin: 0 0 8px; }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { text-wrap: balance; font-size: clamp(28px, 4vw, 40px); line-height: 1.15; letter-spacing: -.02em; margin: 0; }

/* App screenshot */
.screenshot { display: block; max-width: 1000px; margin: 40px auto 0; }
.screenshot img { display: block; width: 100%; height: auto; }

/* Features */
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.feature { background: var(--card); border-radius: 18px; padding: 28px; box-shadow: var(--shadow); }
.feature h3 { font-size: 20px; margin: 16px 0 6px; }
.feature p { margin: 0; color: var(--label-2); }
.icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); }
.icon svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* Steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: step; }
.steps li { counter-increment: step; padding: 28px; border-radius: 18px; background: var(--card); box-shadow: var(--shadow); }
.steps li::before { content: counter(step); display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 15px; }
.steps h3 { font-size: 18px; margin: 16px 0 6px; }
.steps p { margin: 0; color: var(--label-2); font-size: 16px; }

/* Call to action */
.cta { text-align: center; color: #fff; background: radial-gradient(600px 260px at 50% 120%, rgba(52, 211, 153, .35), transparent 70%), var(--deep); border-radius: 28px; padding: 64px 24px; }
.cta img { width: 72px; height: 72px; }
.cta h2 { font-size: clamp(26px, 4vw, 36px); line-height: 1.2; margin: 20px 0 10px; }
.cta p { color: rgba(255, 255, 255, .7); margin: 0 auto 28px; max-width: 520px; }
.cta .button { background: #34d399; color: #06281e; }
.cta .note { color: rgba(255, 255, 255, .5); }

/* Prose pages */
article { padding-block: 56px 24px; }
article h1 { font-size: clamp(30px, 5vw, 40px); margin: 0 0 24px; text-align: left; }
article h2 { font-size: 22px; margin: 40px 0 8px; }
article li { margin: 6px 0; }
article pre { white-space: pre-wrap; background: var(--card); padding: 20px; border-radius: 14px; font: 14px/1.7 ui-monospace, "SF Mono", Menlo, monospace; box-shadow: var(--shadow); overflow-x: auto; }
.card { background: var(--card); border-radius: 18px; padding: 8px 28px 24px; box-shadow: var(--shadow); margin-top: 16px; }
.checksum { font: 13px/1.5 ui-monospace, "SF Mono", Menlo, monospace; word-break: break-all; color: var(--label-2); max-width: 560px; margin: 16px auto 0; }

/* Footer */
.site-footer { margin-top: 72px; border-top: .5px solid var(--separator); }
.site-footer .wrap { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; padding-top: 28px; padding-bottom: 48px; color: var(--label-3); font-size: 14px; }
.site-footer span { margin-right: auto; }
.site-footer a { color: var(--label-2); }

@media (max-width: 760px) {
  section { padding-block: 56px; }
  .features, .steps { grid-template-columns: 1fr; }
  .site-header nav { gap: 16px; }
  .site-header nav .secondary { display: none; }
  .screenshot { margin-inline: -12px; }
}

/* FAQ */
.lead-left { font-size: 19px; color: var(--label-2); margin: -8px 0 8px; }
.qa { background: var(--card); border-radius: 14px; box-shadow: var(--shadow); margin: 10px 0; }
.qa summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 16px 20px; font-weight: 600; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; flex: none; font-size: 22px; font-weight: 400; line-height: 1; color: var(--label-3); transition: transform .2s; }
.qa[open] summary::after { transform: rotate(45deg); }
.qa > div { padding: 0 20px 4px; color: var(--label-2); }
.qa > div > :first-child { margin-top: 0; }
.qa table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 8px 0; }
.qa td { padding: 8px 0; border-top: .5px solid var(--separator); vertical-align: top; }
.qa td:first-child { color: var(--label); padding-right: 16px; }
.qa b { color: var(--label); font-weight: 600; }
.more { text-align: center; margin-top: 24px; font-weight: 600; }

/* Changelog */
.subscribe { display: grid; grid-template-columns: auto 1fr auto; gap: 20px; align-items: center; background: var(--card); border-radius: 18px; padding: 24px; box-shadow: var(--shadow); margin: 24px 0 16px; }
.subscribe h2 { font-size: 18px; margin: 0 0 4px; }
.subscribe p { margin: 0; color: var(--label-2); font-size: 15px; }
.subscribe p + p { margin-top: 4px; }
.subscribe code { word-break: break-all; }
.release { padding: 24px 0; border-bottom: .5px solid var(--separator); }
.release:last-of-type { border-bottom: 0; }
.release-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.release-head h2 { margin: 0; font-size: 24px; }
.release-head span { font-weight: 600; color: var(--label-2); }
.release-head time { margin-left: auto; color: var(--label-3); font-size: 14px; font-variant-numeric: tabular-nums; }
.release p { color: var(--label-2); }
.release ul { padding-left: 20px; }

@media (max-width: 760px) {
  .subscribe { grid-template-columns: 1fr; }
}